Are you trying to play the files with Windows Media Player?

Have you tried with another/other player(s)?

From a very quick Google, it looks like this error could be a WMP error. See whether VLC will play the files. Check this thread for info & a download link for VLC (free player with codecs installed to play most file types): http://www.gnutellaforums.com/tips-t...p3-fixers.html